GSTAT: Optimize power value for IDW

Hi All,

ArcGIS has a nice little button that calculates the optimal power value 
to use for inverse distance weighting based on cross-validation and 
RMSPE. Just wondering if anyone had written something similar in R -- 
I'm using GSTAT and I'd like to avoid back and forth with ArcGIS (and 
obviously I'd like to avoid writing it myself as well!).

Zev

Zev Ross
ZevRoss Spatial Analysis
120 N Aurora, Suite 3A
Ithaca, NY 14850
607-277-0004 (phone)
866-877-3690 (fax, toll-free)
zev at zevross.com